초록 ▼

A proximity sensor system includes a sensor matrix array having a characteristic capacitance on horizontal and vertical conductors connected to sensor pads. The capacitance changes as a function of the proximity of an object or objects to the sensor matrix. The change in capacitance of each node in

A proximity sensor system includes a sensor matrix array having a characteristic capacitance on horizontal and vertical conductors connected to sensor pads. The capacitance changes as a function of the proximity of an object or objects to the sensor matrix. The change in capacitance of each node in both the X and Y directions of the matrix due to the approach of an object is converted to a set of voltages in the X and Y directions. These voltages are processed by circuitry to develop electrical signals representative of the centroid of the profile of the object, i.e, its position in the X and Y dimensions. Noise reduction and background level setting techniques inherently available in the architecture are employed.

대표청구항 ▼

[ What is claimed is:] [1.] A method for modifying a scrollbar message generated by a computer system operating system in response to object position information sensed by a touch sensor pad and transmitted by a touchpad driver to said operating system, including the steps of:generating pressure inf

[ What is claimed is:] [1.] A method for modifying a scrollbar message generated by a computer system operating system in response to object position information sensed by a touch sensor pad and transmitted by a touchpad driver to said operating system, including the steps of:generating pressure information from object contact information from the touch pad sensor;intercepting the scrollbar message generated by the operating system;modifying the scrolling rate of the scrollbar message to be a function of the pressure information from the touch pad sensor; andtransmitting said modified scrollbar message to an application.